stewarti, Heptapterus Haseman [J. D.] 1911:376, Pl. 74 [Annals of the Carnegie Museum v. 7 (nos 3-4) (19); ref. 2048] Serrinha Paraná, in a creek about one half mile from the Rio Iguaçú, Brazil. Holotype (unique): FMNH 54234 [ex CM 2850]. Type catalog: Henn 1928:76 [ref. 12305], Ibarra & Stewart 1987:46 [ref. 12367], Ferraris 2007:184 [ref. 29155]. •Valid as Heptapterus stewarti Haseman 1911 -- (Burgess 1989:277 [ref. 12860], López et al. 2002:59 [ref. 26808], Bockmann & Guazzelli in Reis et al. 2003:413 [ref. 27061], Ferraris 2007:184 [ref. 29155], Aguilera et al. 2011:243 [ref. 31080], Azpelicueta et al. 2011:326 [ref. 31489], Aguilera et al. 2017:579 [ref. 35499], Faustino-Fuster et al. 2019:371 [ref. 36604], Reis et al. 2020:465 [ref. 38364]). Current status: Valid as Heptapterus stewarti Haseman 1911. Heptapteridae: Heptapterinae. Distribution: South America: Iguaçu River basin (southern Brazil). Habitat: freshwater.